Following his organ and organ composition degree studies (legally classified as university degree, as for law no. 508 on 21 December 1999) at Conservatoria Giuseppe Verdi in Milan, Mr. Mottadelli started his career with a two year appointment as 1st Kapellmeister at the Stadttheater Bern, Switzerland in 1999, being in charge of all the operatic repertoire. Whilst in Bern, he was invited to conduct a touring production of Verdi’s Nabucco, as well as Un Ballo in Maschera with the orchestra and choir of Bolshoi Minsk.

In 2001, he made his USA debut conducting Puccini’s Turandot at the Colorado Opera Company. In the same year, he also made his debut in South Africa, conducting Verdi’s Rigoletto and Mahler's 2nd Symphony at the Opera of Cape Town. Invitations for international appearances followed steadily in 2002, adding Germany to the list. During the same year, he also traveled to Belarus to continue his work with the choir and orchestra of Bolshoi Minsk and conducting their production of Puccini’s Tosca at the Bolshoi Theatre, Minsk.

Between 2002 and 2008, among other productions, Mr. Mottadelli conducted Weber’s Der Freischütz and Rigoletto at The National Danish Opera, symphonic concerts with Odense and Aalborg Symphony Orchestras, Bialystok Philharmonic Orchestra (Poland), Orchestra Teatro Coccia from Novarra, the Aarhus Symphony Orchestra (Denmark), and the Slovak Radio Symphony Orchestra in Bratislava. During this period he made several appearances with Cairo Symphony Orchestra both in Cairo and in Jordan, at a Gala Concert starring Placido Domingo and Julia Migene.

From 2008 until 2011, Mr. Mottadelli also held the position of General Music Director to the Cairo Symphony Orchestra. During this time, he also debuted in South Korea at the Seongnam Art Centre in Seoul, and conducted Verdi’s Don Carlos at the Royal Danish Opera, in Copenhagen. Further invitations to Denmark followed, where he conducted Donizetti's L’elisir d'Amore and Puccini’s Manon Lescaut at the Danish National Opera, in 2009 and 2010.

Marcello Mottadelli was particularly honored to have a guest performance at the prestigious and globally acclaimed Nobel Prize Concert in Stockholm in 2011, where he conducted the Royal Stockholm Philharmonic Orchestra, featuring tenor Joseph Calleja, in the presence of the Nobel Prize laureates and the Swedish Royal family.

During the same and following year, other appearances included Verdi’s Aida at the Cairo Opera House, several symphonic concerts at Teatro Carlo Felice di Genova and Teatro Verdi di Trieste, Verdi’s La Traviata at the Royal Danish Opera in Copenhagen and Donizetti’s Lucia di Lammermoor at the Swedish summer opera festival ‘Opera pä Skäret’, which was greatly received by the international critics.

In 2013, he conducted Madama Butterfly at the Teatro Massimo in Palermo, Puccini’s La Bohème in Seoul and had several appearances with the Nürnberger Symphoniker, in Germany. He returned to festival ‘Opera pä Skäret’ to conduct Verdi’s Otello in 2014 and La Traviata in 2015.

His works also include conducting Verdi’s Nabucco in Cremona, Brescia, Como and Pavia in 2014, Madama Butterfly in Trapani in October 2016, a symphonic concert in Nuremberg and recordings for Bayerische Rundfunk the same month and Giordano’s Andrea Chénier in Sassari in December 2016.

Between 2016 and 2017, Mr. Marcello Mottadelli was the Artistic and Musical Coordinator, with functions of Artistic Director at the Bucharest National Opera House, where he conducted and premiered several operas. The Romanian stage hosted a series of successful productions, having guested well known artists, such as Ramon Vargas, Roberto Alagna, Nelly Miricioiu and Sumi Jo.

Along with the appreciation of his work at the Romanian biggest lyrical theatre, Marcello Mottadelli’s international career continued to be on top. In the summer of 2017, his longtime collaboration with ‘Opera pä Skäret’ continued with 12 performances of Madama Butterfly. At the beginning of 2018, Mr. Mottadelli became the Artistic and Music Coordinator of the Romanian National Opera House of Iasi, holding this position until July, same year. Meanwhile, in March 2018, Mr. Mottadelli also conducted at the Royal Opera House in Muscat. For the above mentioned concert, he worked with Roberto Alagna and Aleksandra Kurzak as performing artists, coordinating the Prague Philarmonic. Later on, he led a successful Turandot at the Croatian National Theater of Zagreb with 5 performances, taking place in May 2018.

His upcoming engagements for the season 2018/2019 include Turandot at the Croatian National Theater, Verdi’s Falstaff at Opera Lombardia, a concert starring Vittorio Grigolo along with the Zagreb Philarmonic at the Royal Opera House in Muscat, Oman, Falstaff at Circuito Marchigiano, a concert with the Symphony Orchestra in Nuremberg, Germany and Madama Butterfly with Roberto Alagna and Aleksandra Kurzak at the Main Square in Warsaw, Poland.